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Method for identifying particle shoal facies of carbonate rocks

A carbonate rock and particle technology, applied in the identification of carbonate rock grain shoal facies, based on Fisher linear discriminant analysis to identify carbonate rock grain shoal facies, can solve the problem of difficult identification of grain shoal facies, and avoid artificial The effect of mistakes, cost reduction, and high application value

Inactive Publication Date: 2018-05-25
PETROCHINA CO LTD
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Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a method for identifying carbonate rock grain shoal facies, which solves the problem of difficult identification of grain shoal facies in wells without cores and field outcrop data, and greatly improves the scale. Identification efficiency of grain shoal facies in larger work area

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  • Method for identifying particle shoal facies of carbonate rocks
  • Method for identifying particle shoal facies of carbonate rocks
  • Method for identifying particle shoal facies of carbonate rocks

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Embodiment

[0036] This embodiment provides a method for identifying carbonate grain shoal facies, the main flow of the method is as follows figure 1 As shown, it includes the following steps:

[0037] Table 1

[0038]

[0039] Step S101, obtaining the logging data and sedimentary facies types of the depth of each well section in the reference well position in the reference interval:

[0040] In this embodiment, a certain well location in a certain basin oilfield area in China is taken as the research object, and core data and data, logging data and data, seismic data and data of more than 30 wells are collected, and this is screened to ensure that the data The data and data are complete and reliable; based on the obtained data and data, observe, describe and classify the cores of outcrops and wells to establish the evolution sequence of lithology in the reference interval, and then according to the lithology, sedimentary structure and structure Identify the types of sedimentary faci...

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Abstract

The invention provides a method for identifying particle shoal facies of carbonate rocks. The method comprises that logging data and sedimentary facies types of a reference well location in differentwell depths within a reference section are obtained; the logging data and sedimentary facies types of the reference well location in different well depths within the reference section are analyzed todetermine a sedimentary facies type discriminating formula; and according to the sedimentary facies type discriminating formula and the obtained logging data of the reference well location in different well depths within the reference section, sedimentary facies types of a to-be-measured well location in different well depths within the reference section are determined. The logging data comprisesnatural Gamma logging GR data, sound wave time difference logging AC data and stratum real resistivity RT data; and the sedimentary facies types include a particle shoal facies and a non-particle shoal facies. Via technical schemes provided by the invention, the problem that the particle shoal facies of a log without rock core and field outcrop data is hard to identify is solved, and the particleshoal facies of a work area in relatively large scale can be identified much more efficiently.

Description

technical field [0001] The invention relates to a method for identifying carbonate grain shoal facies, in particular to a method for identifying carbonate grain shoal facies based on Fisher linear discriminant analysis, and belongs to the technical field of petroleum and natural gas geological exploration. Background technique [0002] Grain-shoal facies are very important sedimentary bodies in carbonate sedimentary basins, and the development of grain-shoal facies is closely related to reservoirs. [0003] At present, the effective identification technology of grain shoal facies is still immature, which seriously restricts the progress of exploration. At present, a lot of manpower and material resources have been invested in core observation, drilling and logging data and field geological research. However, there are few existing outcrop investigations and drilling coring, and the cost of drilling and coring is too high, the progress is slow, and the cycle is long. It is di...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 贾鹏李伟李明李鑫
Owner PETROCHINA CO LTD
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